Mechanism for washing, sizing, and concentrating black sands and their inherent metals



T. A. ROGERS AND 1. E. REID.

MECHANISM FOR WASHING, SIZiNG, AND CONCENTRATING BLACK SANDS AND THEIR INHERENT METALS.

APPLICATION FILED JULY 22.1919- Patented Dec. 21, 1920.

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T A. ROGERS AND J. E. REID. MECHANISM FOR WASHING, SIZING, AND CONCENTRATING BLACK SANDS AND THEIR INHERENT METALS.

APPLICATION FILED JULY 22. 1919.

Patented Dec. 21, 1920.

2 SHEETS-SHEEI 2.

UNITED STATES tries.

TYLER. A. noen'ns AND JOHN nnwaan Ra n, or roarnann, onneon.

MECHANISM FOR WASHING, SIZING, AND CONGENTBATING- BLACK SANDS AND THEIR INHERENT METALS.

Specification of Letters Patent.

Patented Dec. 21, 1920.

Application filed July 22, 1919. Serial No. 312,551.

To all whom it may concern:

Be it known that we, TYLER A. Beans and JOHN EDWARD REID, citizens of the United States of America, residing at Portland, in the county of Multnomah and State of Oregon, have invented certain new and useful Improvements in lilechanism for Washing, Sizing, and Concentrating Black Sands and Their Inherent Metals, of which the following is a specification.

This invention relates to certain new and useful improvements in mechanism for washing, sizing and concentratingblack and other mineral bearing sands and their inherent metals.

One of the objects of the invention is to provide improved means for mechanically washing, sizing and concentrating black and other mineral bearing sands and their therein contained metals and for disposing of as many different over sizes as there are screens employed in the construction.

Another object is to provide a mechanical means for adjusting the incline or degree of pitch of the screen frames, whereby the ma terial may be held in suspense in its travel over the screens, to permit of thorough this integration of the metals from the adherent substances of no value and for passing these metals through the screens until theyhave become cleansed of all aiiinities and are capable of separation.

Another object is to provide means, whereby the compression stroke which resolves itself in to an impact on passing the ends of the cams, is imparted at four properly spaced points simultaneously, so that undue wrack and strain on a vertically movable frame carrying the screens is reduced to a minimum.

Still another object is to provide means included in the impactmechanism, to receive the upward impact resulting from the compression stroke. This means consists of hinged covers on the cams which depress the vertically movable screen carrying frame and springs having slightly less compression than the main or impact springs, are provided for the purpose of forcing these hinged covers away from the axes of the cams.

A further object is to provide four vertical machined guides which serve the parpose of maintaining a solid, rigid vertical alinement of the frame. These guides allow easy compression and upward impact to the vertically movable frame and furnish a means to rigidly support stationary pans which collect the products passing through one screen and carrv the same onto the head of the followlng screen.

Another object is to provide a machine of the above character, in which the compression mechanism is arranged above the screens or vertically movable frame, so that material being fed into the machine will not contact with the compression mechanism and cause unnecessary wear.

A still further object of the invention is to provide partitions in the stationary conveying pans, so that the material passing over the pans will be separated into a plurality of streams for the purpose of preventing congestion at any one point.

lVith the foregoing objects outlined and with other objects in view, the invention consists in the novel features hereinafter described in detail, in connection with the accompanying drawings and more particularly pointed out in the appended claims.

Referring to the drawings;

Figure l is a side View of the entire apparatus.

Fig. 2 is an end view with the spraying mechanism removed for the purpose of clearness.

Fig. 3 is a perspective view, partly broken away, of one ofthestationary conveying pans which we employ.

Fig. 4' is a perspective view, partly broken away, of oneof the screen frames showing screens installed.

Fig. 5 is a vertical sectional view of one of our improved impact cams.

In the drawings, 1 represents the base of our improved machine on which is mounted a suitable motor or other driving unit 2 and four spaced vertical guides or posts 3. These posts are threaded at their lower ends, as shown at 4:, to engage adjusting nuts 5, upon which rest impact springs 6, the nuts 5 being the means for adjusting the tension of the springs 6. The springs 6 yieldingly support a frame 7 which carries a number of screens described hereinafter. The frame has a lower plate 8 that is vertically movable on the guides 3 and is provided at its corners with detachable bearing covers 9 to permit the plate to be mountedon or detached from said' guides. The plate carries four vertically extending, rigid posts 10, which support an upper plate 11 that is slidably mounted on the posts 3 and has detachable bearings 12 to permit attachment of the plate to said posts. The posts 10 carry a series of screen frames 13, mounted one above the other and angularly adjustable on said posts 10. One end of each screen frame is pivoted at 14 to the posts 10 and the posts are provided with a series of vertical apertures 15, to permit adjustment of one end of the screen frames 13. By placing the pin which supports the lower end of each screen frame 13 in the various apertures in the posts 10, said lower ends may be adjusted vertically and, as shown in Fig. 1, to accommodate this vertical adjustment, each of the screen frames is provided with a plurality of elongated apertures 16. Each of the screens has two spaced layers of screen netting 17 and this netting is held in spaced relation by rods 18 which pass from an end 19 of a screen frame, to brackets 20 at the other end of said frame. These rods are placed one above the other with one thickness of screen between each two rods and the rods are so spaced laterally as to give added rigidity to the fine meshed screens. This double layer screen provides a means for obtaining maximum separation, disintegration and thorough scouring of the materials passing through the screens.

Mounted on the stationary posts 3 are a series of conveying pans 21, each of which has its ends secured to the posts by means of collars 22 and the collars, together with the pans, may be vertically .lCljUStBdOIl the posts 3, to accommodate adjustments of the screens 13. Set screws 23 are provided for the purpose of clamping the collars 22 to the posts 3. Each conveying pan 21 has its bottom divided into a series of channels by means of T-irons 24, for the purpose of making ridges or reinforcing the'pans and for separating the material being conveyed into a plurality of streams, whereby congestion of the material atany one point will be prevented.

The upper plate 11 of the movable frame 7, is provided with four spaced, vertically extending lugs 25 which engage the peripheries of cams 26 that act to depress the movable frame 7. The cams are carried by shafts 27, supported by bearing blocks 28, carried by a stationary plate 29, which is adjustably mounted on the upper ends of the posts 3 and is held in place by adjusting nuts 30.

the'motor 2 and the cams 26 are rotated to 5..

depress the 1. .QJsabl.e.v sqr eatrame As shown in Fig. 1, a pipe 33 for conveying water, extends up one side of the machine and is provided with a series of connections 34, which support horizontally extending pipes 35, carrying at their ends a series oft perforated pipes 36, as shown in the drawings. Each one of the pipes 36 is arranged centrally above a screen frame 13, so that water issuing from said pipes, will be sprayed downwardly upon the material passing over the screens, for the purpose of washing and securing the sands and metals.

A feeding hopper or chute 37 is connected to the upper end of the machine and feeds the material to be separated or sized into the top screen 13 and a number of discharge chutes 38 are provided for the purpose of carrying away the material which passes over the screens.

The operation of the machine is as follows: The motor 2being started, motion will be imparted to the cams 26 through the medium of the belt 31 and chain 32. These cams simultaneously depress the vertically movable frame 7 at four properly spaced points and this im darts a uniform downward movement to t e frame 7 and its connected parts. When the earns 26 have depressed the frame to their maximum extent, the frame is given an upward impact by the springs 6. As the frame 7 is agitated vertically, the black and other mineral bearing sands will be fed in through the chute 37 and be deposited upon the top screen 13. At this time water is being sprayed upon all of the screens and as the material passes over the upper screen, a certain amount of sand and metals are driven and washed through the screen13 to fall upon the first conveying pan 21. The oversize material 1 which will not pass through the screen 13 will gravitate down the same and be discharged into the top discharge chute 38, while the material which falls into the top conveying pan'21, will be conveyed to. the upper end of the second screen 13 and will be partly passedthereover or partly passed therethrough. It will. be understood that the netting in the screens 13 is of graduated mesh, so that the upper screen will permit the passage of comparatively large pieces of material, while the second screen will not permit pieces of this size to pass, and the third screen, of course, will not permit the passage of as large pieces, as the second screen and so on. It. will thus be seen that material of certain size will be discharged by the chute 38 which receives material from the top screen 13, while material of successively reduced sizes will be discharged through the second, third and fourth chutes in the order named.

In order to prevent the springs 6 from driwing the frame 7 upwardly against a nonresisting body, we have as shown in Fig. 5.

provided each cam 26 with three hinged covers 39 pivoted at 40 and forced away from the axis of the cam by means of a small compression spring 41. Fig. 5 shows each of the springs 41 in compressed condition but this condition is obtained only when the frame 7 is moving upwardly against the end 42 of one of the hinged covers on each of the cams. In other words, as the cams rotate in unison, the ends 43 of the hinged covers, which are farthest away from the axes of the cams, will act to depress the lugs 25 and when said lugs are released by the ends 43 said lugs, together with the vertically movable frame will be forced upwardly by means of the springs 6, and this will cause said lugs to engage the ends 120f adjacent covers and depress the springs (41 of those covers, thereby absorbing the vertical impact from the frame 7 In this manner the upward impact of the springs 6 is received by the springs 41', so that both upward and downward movements are permitted by yielding means.

We are aware that various changes may be made in the foregoing construction with out departing from the spirit of the invention, as set forth in the following claims.

What we claim and desire to secure by Letters Patent is 1. An apparatus of the class described comprising a stationary frame consisting of a base plate, a topplate and vertical guide posts rigidly connecting said plates together, a vertically movable frame slidably mounted on said posts and carrying a series of superposed reverse inclined screens, means located between the bottom of said vertically movable frame and said base plate for applying a resilient upward thrust and impact to the vertically movable frame, means for intermittently depressing the vertically movable frame, and a series of conveyer pans fixed to said posts and located between the screens.

2. An apparatus of the kind defined by claim 1 in which the ends of the screens are adj ustably mounted in the vertical movable frame for regulating the incline of said screens relatively to the movable frame.

3. An apparatus of the kind defined by claim 1 in which the pans are reversely inclined to correspond with the inclines of said screens.

4. An apparatus of the kind defined by claim 1 in which the means for applying a resilient upward thrust is located at the lower end of each of the vertical posts.

5. An apparatus of the kind defined by claim 1 in which the means for applying a resilient upward thrust consists of a plurality of coiled springs, one of which sur rounds the lower end of each of said posts.

6. An apparatus of the kind defined by claim 1 in which the means for applying a resilient upward thrust consists of a plurality of coiled springs, one of which encircles the lower end of each post, and means for adjusting the tension of said springs.

7. An apparatus of the kind defined by claim 1 in which the vertically movable frame includes a plurality of plates, each having at its corners detachable bearing members which slidably engage. said posts.

8. A separating apparatus comprising a series of spaced rigid, vertical posts, each having a coiled spring arranged at its lower end, a plate resting on said coiled springs and supporting a series of vertical posts, 80 an upper plate carried by the last named posts and guided by the first named posts, a series of superposed screens carried by the plate supported posts, a series of conveying pans carried by the first named posts and located between said screens, and means for depressing said upper plate and its connected parts.

9. An apparatus of the kind defined by claim 1, in which each of the screens consists of a frame provided with sets of rods, the rods of each set being arranged one above the other, and a plurality ofsheets of screen netting located between the rods, said rods functioning to space the sheets apart and to reinforce the same.

10. An apparatus of the kind defined by claim 1 in which each of the pans is provided with a plurality of longitudinally extending spaced ridges which divide the upper side of 100 the pan into a plurality of channels for the purpose of separating the material and con veying it in a plurality of streams.

11. An apparatus of the kind defined by claim 1 in which the vertically movable 105 frame is provided with a plurality of vertically extending lugs and the means for de pressing the frame include a plurality of cams with which the lugs are held in con tact by the means for applying a resilient 101 upward thrust to the vertically movable frame.

12. An apparatus of the kind defined by claim 1 in which the means for depressing the vertically movable frame include a plu- 115 rality of horizontal shafts carrying cams which are in constant engagement with portions of said vertically movable frame, means connecting said shafts for joint movement and means for driving one of said shafts.

18. An apparatus of the class described comprising a stationary frame, consisting of a base plate, a top plate and vertical guide posts rigidly connecting said plates together, a vertically movable frame located between 125 said plates, slidably mounted on said posts and having top and bottom plates, coiled springs surrounding said posts and located between the base plate and said bottom plate,

a plurality of shafts supported by the top 130 plate of the stationary frame and carrying a plurality of cams, lugs extending from the top plate of the movable frame and held in engagement with said cams by said springs, a series of superposed screens carried by the vertically movable frame and a series of superposed stationary pans fixed to said posts.

l l. An apparatus of the kind definedby claim 13 in which the cams include shock absorbing elements for resiliently receiving impacts imparted by said springs.

15. An apparatus of the class described comprising a stationary frame consisting of a base plate, a top plate and four vertical posts rigidly connecting said plates together, a vertically movable frame slidably mounted on said posts andincluding a bottom plate, a coiled spring surrounding each of said posts and located between the base plate and bottom plate, a plurality of shafts sup ported by said top plate and carrying a plurality of cams, vertical lugs extending upwardly from said movable frame andheld in engagement with said cams by said springs, a power unit mounted'on the base plate, means connecting said power unit to one of said shafts for driving said last named shaft from the power unit, means connecting V the shafts for joint movement, a series of superposed reverse inclined screens carried by the vertically movable frame, and a series of conveying pans fixed to the posts of the stationary frame and located'between said screens.

In testimony whereof we tures.

TYLER A. ROGERS. J. EDYVARD REID.

afiiX our signa- 

